This plugin is from the developer of the amazing Weaver II and Aspen themes. One (among many) of the great features of these themes is their Show post shortcode.

With this new plugin, he has now released this functionality for everyone to use.

ATW Show Posts allows you to inserts posts anywhere, with full flexibility on how to filter which posts to show, and how to display them. This enables you to create custom post pages, like category pages or pages that combine posts and content in any way you like. You can also insert posts in widgets or any content area of your liking. The many display options can make them anything from full posts to simple titles list.